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Old 09-17-2009 | 10:50 AM
  #68  
flynnaire
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From: Carlsbad, CA
Default RE: SIG planes

Ok john you have to show some more pictures........


ORIGINAL: JohnBuckner

ORIGINAL: rcair08

I just purchased a Kadet Senior stick kit. I want to build it with ailerons. Sig does not have plans available for this mod. Do any of you have experience building the ailerons into the wing?

RCair I know of no plans for doing such but have done ailerons on four kit version Seniors and one Seniorita. Have done one with strip ailerons and the rest with barn door ailerons a bit more work but worth it. The strips are difficult because of the narrow trailing edge piece and the only effective way is to let it overhang the original trailing edge in chord.

Barndoors involve cutting the last five bays and installing a new wing trailing edge in the cutout and a new aileron leading edge in the cutout. I prefer a surface mount servo for each aileron. The surface mount is much less work and perhaps more importantly very easy to make at the field with out the need to remove servo plates to make adjustments.

Here the clear covering on my Quad Kaydet shows an idea on aileron size and the cutout.

There is one very important thing that a lot of the fellows fail to do when performing this mod and that is adding ailerons without reduceing dihedral. Adding either type aileron to a kit senior with stock dihedral will result in very poor roll response from the ailerons, in fact the rudder will still be more responsive. To get a reasonable response from the ailerons it will be neccessary to reduce the dihedral to about one half of the stock dihedral and this will do the trick.

John